EDGES signal in the presence of magnetic fields

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dc.contributor.author Natwariya, Pravin Kumar
dc.contributor.author Bhatt, Jitesh R.
dc.date.accessioned 2020-07-25T16:20:36Z
dc.date.available 2020-07-25T16:20:36Z
dc.date.issued 2020-09
dc.identifier.citation Natwariya, Pravin Kumar and Bhatt, Jitesh R., "EDGES signal in the presence of magnetic fields", Monthly Notices of the Royal Astronomical Society: Letters, DOI: 10.1093/mnrasl/slaa108, vol. 497, no. 1, pp. L35-L39, Sep. 2020. en_US
dc.identifier.issn 1745-3933
dc.identifier.uri https://doi.org/10.1093/mnrasl/slaa108
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/5570
dc.description.abstract We study the 21-cm differential brightness temperature in the presence of primordial helical magnetic fields for redshift z = 10�30. We argue that the ?-effect that sets in at earlier time can be helpful in lowering the gas temperature to 3.2 K at z = 17. This effect can arise in the early Universe due to some parity-violating high-energy processes. Using the EDGES (Experiment to Detect the Global Epoch of Reionization Signature) results, we find the upper and lower limits on the primordial magnetic field to be 6 � 10?3 and 5 � 10?4 nG, respectively. We also discuss the effect of Ly?? background on the bounds. Our results do not require any new physics in terms of dark matter.
dc.description.statementofresponsibility by Pravin Kumar Natwariya and Jitesh R Bhatt
dc.format.extent vol. 497, no. 1, pp. L35-L39
dc.language.iso en_US en_US
dc.publisher Oxford University Press en_US
dc.subject magnetic fields en_US
dc.subject MHD en_US
dc.subject cosmology: observations en_US
dc.subject dark ages en_US
dc.subject reionization en_US
dc.subject first stars en_US
dc.subject dark matter en_US
dc.title EDGES signal in the presence of magnetic fields en_US
dc.type Article en_US
dc.relation.journal Monthly Notices of the Royal Astronomical Society: Letters

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